There was a discussion on that matter after last season draft, some players (including me :P) weren't too happy about drafting short PF's and C's or tall PG's. But from what I heard the draft structure is not going to be changed in the near future, so if your first pick is a C with 5 balls potential and 5 balls skill you better hope he's not 6'0 :P
That draft wasn't great for me, because I drafted two PF's that looked like good prospects, but they were 6'4 and 6'5